Adjustable cam-operating mechanism.



E. WOERNER.

ADJUSTABLE CAM OPERATING MECHANISM.

APPucATloN FILED APR. 25. 1914.

yl@ Patented July 27, 1915v 1 mum aTLsSES y Inh/ENTER l iiuiirniii STATES PATENT ourson.,

EUGEN WORNER, OFiSTUTTGART, GERMANY, ASSIGNOR TO FIRM OF ROBERT BOSCH, OF STUTTGART, GERMANY.

Specification of Letters Patent.

rarest-ed July 27, 1915.

Appncauon aies sprites, 1914. semi no. 834,390.

To all 'Lc/71,0777. 'it m (/y/ concern v Be 1t known that l, llionx lVoniiNnR, ene

' giiieer, a 'subject of` the lii'ipei-or'of Germany, residing at 2S lrerchenstrassc, Stuttgart, Germany, have invented certain new Aand useful Improvements in Adjustable `(`a111-()perati'n,{ ilechanism; and I do hereby declare the following to be a full, clear, and exact description otl the invention, such asl will enable others skilled in the art to- `of the pistons may be varied by hand or automatically by the fuel'regulating mechanisin. For this purpose I provide two cam j actuating.; surfaces capable of relative adjust- Iiiient, so that an oscillatory member coperati-ve with the actuating surfaces may be swung or ieciprocated between adjustable limits. Preferably, l provide two rotatable cani disks in axial'lalinement, one being,r fixed in position to determine the fixed limit in .one direction'of travel of' the oscillatory member, and the other cam disk being axially movable between limits to varythe travel of the oscillatory member in the other direction. llowever,` it desired, both cani disks may be adjustable so that the throw or travel in either or both directions may be varied, or the stroke may be varied in space without being; varied in amount. The ad- .'ustin mechanism for var ino' the axial separation ot' the actuating surfaces is such 'that the relative angular position of the two Y actuating surfaces is maintained at. all points of adjust-ment. j ln the accompanying;f drawings, illustrating .my invention, Figure l shows a side vievv-ofcadjustable cam mechanism for oper-- ating connecting rod; and Fig. 2 shows la side viety of adjustable cam` mechanism for operating' the pistons of circularly arranged lubricating pumps.

ln Fig.v l the fork L carries the rollers l) and c in driving' engagement with the. actuating' surfaces ci and e ot the'cam disks f and These actuating surfaces are provided uiith elevated and depressed portions relatively arranged with respect to one another .so that an elevated portion of one disk is in axial alinement with a correspondingly depressed portiono the other disk, and vice versa. Thus, when the roller c rides upon an elevated portion of the cam disk g, the roller ZJ rides into the axially disposed depressed portion of the cam disk y", and the lever l is thereby forced to the right. The cani disk is pinned to the shaft 7a as shown, but the cam disk g is movable axially of the shaft by means of the threaded sleeve h, which engages the threads on t-he shaft and turns loosely in the hub g. The feather and groove connection g between the cani disk Y f/,aiid the shaft L maintains the relative angular position of the two cam disks at all adv jiistments. Then the cam disks f and g have the greatest separation (asillustrated in liig. l) bot-h the rollers and c Contact at all times with the tivo actuating surfaces.

rl`he collar 'ai ixed on the shaft la prevents the cam disk g from being moved to a position `ot greater separation, so as to preclude the possibility of disrupting the fork a. flliheny the tivo cam disks .are separated by an amount less than that shown in Fig. l, but one ot the rollers b, c contacts at a time 'with an actuatingT surface, while the other rollerv is then separated from its actuating surface. ln. this way,`the stroke of the lever Z, and consequent-ly the stroke of the rod 7' may be varied b v turning the sleeve h and thereby alteringl the 'separation of the actuating snr-v taces of. the two cam disks.

ln Fig. 2, the driving shaft 7c is arranged to be driven in any suitable way. as, for instance. by the worin gear 7a. The lower cam disk is pinned to the shaft k, while the upper` cani disk f/ movable axiallvo the other cani disk on the hub the of.y i' Z1, Z2 extend from the cam i, iii the cam disk 7', so -z to iiitain the angular relation ot' the o ca i disks at all adjusted positions ot sejniration. 'The punii; pistons 'mim m2. 'm are arranged in ay circ" about the driving sha tt and each pump piston carries a` Fork having an adjustable screw nl, n2 or n., on its upper arm and an engaging surface 0 o2 or fr, on its loivsr arm, the actuating; surt'aces ot the cam disk being embraced by the two arras of each fork. rPhe mechanism Jfor varying' the axial separation ot the tivo cam disks comprises the yoke 7) pivoted at 7'?, and engaging at s the adjustable handle g, which is adapted to lightly engagethe holes in the bracket r and to be held disengageably in position thereby. Thus by moving the handle g, the upper cam disk g is moved axially of the cam disk f to' vary the separation between the actuating surfaces thereof. lVhenthe handle g is moved to its lowermost position in'F ig. 2the two cam disks are in contact with each other and the stroke of each piston is then zero, but as the handle is brought upwardly from this position, the stroke of each piston is gradually increased in amount.

It will be apparent that if the cam disk 7' in Fig. 1 or Fig. 2 is made axially movable also, then ,the limit of travelof the lever m to the left in Fig. l, or the limit yofdownward travel of the pistons in Fig. 2, may be Varied as well as the limit of travel in the other direction in each case. Iny addition to changing the limits of the stroke in both directions, the zone in which the oscillatory member moves may also be changed by having both of the cam disks axially adjustable in position.

' Instead of operating the handle, g by hand, it may be arranged to be automatically operated by connecting it to a moving part of the engine or the machine associated with the cam operating mechanism. For instance, the handle may be connected to the regulator of an engine of the Diesel type for the purpose of automatically adjusting the fuel delivered to the engine cylinders in accordance with the position of the governor mechanism of the engine; or the handle may be connected to the mechanism for regulating the amount of gas delivered to 'an internal combustion engine and thereby regulate the amount of lubricating oil delivered to the engine in accordance with the power developed by the engine and thereby 'pre-` i vent an excessive feed of lubricating oil and an excessive amount of oil in the exhaust.

Having thus described my invention, what I claim is:

1. In adjustable cam operating mech-anism, axially-separable rotatable cam. disks having actuating surfaces outwardly disposed in axial direction, and a yoke lhaving ainwardly facing contact surfaces engageable with the actuating surfaces for positive movement of the yoke in two directions.

'2. In adjustable cam operating mechanism, axially-separable rotatable cam disks having actuating .surfaces outwardly disposed in axial direction, a plurality of circularly disposed yokes provided each with inwardly facing' contact surfaces engageable with the actuating surfaces for positively reciprocating the yoke, and adjusting means for adjusting the axial separation of lthe cam disks to vary in like amount ithe i stroke of all the yokes. I

3. In adjustable cam operating mecha- A nism, axially-'separable rotatable cam disks Vhaving actuating surfaces outwardly disjustable for independently adjusting the stroke thereof. j

4. In adjustable cam operating mechanism, rotatable cain mechanism` having axially-separable actuating surfaces, and adjusting mechanism cooperative with the cam mechanism during rotation thereof to vary ,the4 axial separation ofthe actuating surfaces.

5. In adjustable cam operating mechanism, a' rotatable shaft, two cam disks mounted thereon, one being fastened to the shaft and the other being rotatively connected to the shaft and freelyslidable therealong during rotation, and adjusting mechanism cooperative with the slidable4 disk during rotation thereof to varyV the axial separation of the two disks. i

6. In adjustable cam operating mecha'- nism, axially-separable rotatable cam disks havi g actuating surfaces outwardly disposedy in axial direction, one of the cani disks being fixed in axial position and the other being` freely movable in axial direction during rotation, adjusting mechanism coperative with the axially movable disk to vary the axial separation of the two disks, anda yoke having inwardly facing contact sui'- faces coperative with the actuating sur- In testimony whereof I aiix my signature, in presence of two witnesses.

I EUGEN VOERNER.

" Witnesses:

PAUL VVOLFART, Rnrnnonn ELwnirr. v 

